Title :
Mathematical minimization of the time harmonics of the EMF of a DC-PM machine using a finite element method
Author :
Kadded, K. ; Saldanha, R.R. ; Coulomb, J.l.
Author_Institution :
Lab. d´´Electrotech. de Grenoble, St. Martin d´´Heres, France
fDate :
3/1/1993 12:00:00 AM
Abstract :
A procedure allowing the geometrical shape optimization of a permanent-magnet DC (DC-PM) generator in order to reduce the AC components of its open-circuit electromotive force (EMF) is proposed. A 2-D software based on a finite-element method (FEM) associated with a mathematical optimization technique makes it possible to establish an automatic optimization treatment of that generator. The tools, such as the rubber mesh, that make such a procedure possible are presented. The rubber mesh tool associated with an air gap element allows the finite-element topology to be kept constant in the course of one iteration of the optimization process. The formulation of the problem to be minimized has been carried out using a discrete Fourier transform so that the considered harmonics can be substantially reduced
Keywords :
DC generators; Fourier transforms; Maxwell equations; finite element analysis; harmonics; iterative methods; machine theory; minimisation; permanent magnet machines; power engineering computing; 2D software; AC components; DC-PM machine; EMF; FEM; Maxwell equations; air gap element; automatic optimization treatment; discrete Fourier transform; finite-element method; finite-element topology; geometrical shape optimization; iteration method; mathematical minimisation; mathematical optimization technique; open-circuit electromotive force; permanent magnet DC generator; rubber mesh tool; time harmonics; AC generators; Equations; Finite element methods; Magnetic circuits; Magnetic flux; Minimization; Optimization methods; Permanent magnets; Shape; Voltage;
Journal_Title :
Magnetics, IEEE Transactions on
